Figure 4
![Figure 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1743-422X-7-208/MediaObjects/12985_2010_Article_953_Fig4_HTML.jpg)
Locations of 14 amino acid differences (L212 S not shown) mapped in the surface capsid proteins of FMDV O/Fujian/CHA/5/99 (A) and O/Tibet/CHA/1/99 (B). The potential critical amino acid residues were measured at positions 136 in VP2; 174 in VP3; 142, 152, 153 in VP1, which are represented as globe in VP2 (blue), VP3 (green) and VP1 (yellow), respectively.